<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .playerBox{
            width: 100%;
            height: 422px;
            position: relative;
            overflow: hidden;  /*这个是必须加的，否则会有阴影层*/
        }
        .bg_color{
            width: 100%;
            height: 100%;
            position: absolute;
            filter: blur(60px);
            opacity: 0.5;
        }

    </style>
</head>
<body>
<div>
    55555555555555699999999999999999999999999999999999999999999999999
</div>
<div class = 'playerBox'>
    <img class="bg_color" src="http://edit.2or3m.com/subject/php/20180109/0/HDE6TPj5Tc.jpg"/>
    555555555555555555555555555
</div>
</body>
</html>